thermometer

thermometer

[ther-mom´ĕ-ter]

an instrument for determining temperatures, in principle making use of a substance (such as alcohol or mercury) with a physical property that varies with temperature and is susceptible of measurement on some defined scale.

centigrade thermometer one having the interval between two established reference points divided into 100 equal units, such as the Celsius thermometer.

clinical thermometer one used to determine the temperature of the human body.

electronic thermometer a clinical thermometer that uses a sensor based on thermistors, solid-state electronic devices whose electrical characteristics change with temperature. The reading is recorded within seconds, some having a red light or other device to indicate when maximum temperature is reached. Available models include hand-held, desk-top, and wall-mounted units, all having probes that are inserted orally or rectally.

2. one that registers the maximum or minimum temperature attained in the measurement.

tympanic thermometer an electronic clinical thermometer that gives a digital reading in less than two seconds. Second-generation tympanic thermometers work by monitoring the temperature when the ear opening is sealed.

ther·mom·e·ter

(ther-mom'ĕ-tĕr),

An instrument for indicating the temperature of any substance; often a sealed vacuum tube containing mercury, which expands with heat and contracts with cold, its level accordingly rising or falling in the tube, with the exact degree of variation of level being indicated by a scale, or, more recently, a device with an electronic sensor that displays the temperature without the use of mercury.See also: scale.

[thermo- + G. metron, measure]

thermometer

/ther·mom·e·ter/ (ther-mom´ĕ-ter) an instrument for determining temperatures, in principle making use of a substance with a physical property that varies with temperature and is susceptible of measurement on some defined scale.

clinical thermometer one used to determine the temperature of the human body.

infrared tympanic thermometer a clinical thermometer inserted into the external acoustic meatus to determine the body temperature by measuring the infrared radiation emanating from the tympanic membrane.

oral thermometer a clinical thermometer that is placed under the tongue.

recording thermometer a temperature-sensitive instrument by which the temperature to which it is exposed is continuously recorded.

rectal thermometer a clinical thermometer that is inserted into the rectum.

thermometer

(thər-mŏm′ĭ-tər)

n.

An instrument for measuring temperature, especially one having a graduated glass tube with a bulb containing a liquid, typically mercury or colored alcohol, that expands and rises in the tube as the temperature increases.

ther·mom·e·ter

(thĕr-mom'ĕ-tĕr)

An instrument for indicating the temperature of any substance; formerly a sealed vacuum tube containing mercury, which expands with heat and contracts with cold, its level accordingly rising or falling in the tube, with the exact degree of variation of level being indicated by a scale, but increasingly a digital apparatus. See also: scale

[thermo- + G. metron, measure]

thermometer

A device for registering body temperature. Thermometers may be analogue, as in the case of the common mercury expansion thermometer or colour-change devices, or may have a digital display.

ther·mom·e·ter

(thĕr-mom'ĕ-tĕr)

An instrument for indicating temperature of any substance; often sealed vacuum tube containing mercury, which expands with heat and contracts with cold, its level accordingly rising or falling in the tube, with exact degree of variation of level being indicated by a scale, or, today, a device with an electronic sensor that displays temperature without use of mercury.

[thermo- + G. metron, measure]

thermometer,

n instrument used for taking temperature readings. Varying designs of the thermometer allow the temperature to be taken in the oral cavity, rectum, or externally at the axillary or groin areas.

thermometer, external,

n a reading from a thermometer taken at an external location (the armpit or groin) instead of by an internal method (the oral cavity or rectum).

thermometer, rectal,

n a thermometer used to take temperature readings by insertion into the rectum of the patient.

thermometer

an instrument for determining temperatures, in principle making use of a substance (such as alcohol or mercury) with a physical property that varies with temperature and is susceptible of measurement on some defined scale.

Celsius thermometer

one employing the Celsius scale, that is, with the ice point at 0 (0°C) and the normal boiling point of water at 100 degrees (100°C).

centigrade thermometer

one having the interval between two established reference points divided into 100 equal units, as the Celsius thermometer.

clinical thermometer

one used to determine the temperature of the patient in clinical situations.

electronic thermometer

a clinical thermometer using a sensor based on thermistors, solid-state electronic devices whose electrical characteristics change with temperature. The reading is recorded within seconds, some having a red light or other device to indicate when maximum temperature is reached. Available models include handheld, desk-top and wall-mounted units, all having probes that are inserted orally or rectally. It is expected that electronic thermometers worn by the patient will have some use.

Fahrenheit thermometer

one employing the Fahrenheit scale, that is, with the ice point at 32 and the normal boiling point of water at 212 degrees (212°F).

Kelvin thermometer

one employing the kelvin scale.

recording thermometer

a temperature-sensitive instrument by which the temperature to which it is exposed is continuously recorded.

rectal thermometer

a clinical thermometer that is inserted in the rectum for determining body temperature.

resistance thermometer

one that uses the electric resistance of metals for determining temperature (thermocouple).

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